There is one start bit, eight data bits,
and one stop bit, meaning a maximum 
transmission rate of 3125 bytes per second.
If the first bit is set (1), the byte is a 
Status Byte. The Status Byte 
determines the length of most messages, 
which are usually one, two, or three bytes long.  
System Exclusive messages are 
variable length, and have a beginning and 
ending status byte.